Start-up entries aren’t necessarily trojans, if they were I would also expect ST to also detect the actual file and not just the registry entry for 1 and 2.
Re item 2. http://www.liutilities.com/products/wintaskspro/processlibrary/nmbgmonitor/.
I don’t use msn messenger but I would have doubts about item 1. being an invalid startup item.
Item 3 seems incomplete as it isn’t showing a file name only a folder ?
You could also check the offending/suspect file/s (items 1, 2, 4) at: VirusTotal - Multi engine on-line virus scanner I feel virustotal is the better option as it uses the windows version of avast (more packers supported) and there are currently 32 different scanners.
Or Jotti - Multi engine on-line virus scanner if any other scanners here detect them it is less likely to be a false positive. Report the findings here.
avast doesn’t scan for registry entries, nor is is an anti adware application although it does detect some adware. Since item three doesn’t have a file name we can’t say what it is or if avast would detect it.
